• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Statistic simulation of chemical reactions in single molecular junctions

Research Project

Project/Area Number 19K15505
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionOsaka University

Principal Investigator

Ohto Tatsuhiko  大阪大学, 基礎工学研究科, 助教 (90717761)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords第一原理計算 / 伝導計算 / 単一分子接合 / 密度汎関数法 / 非平衡グリーン関数法 / 分子動力学法
Outline of Research at the Start

これまでの単一分子接合の研究では、実験では破断過程に沿って大量の電流-電圧曲線が得られるのに対し、理論計算では最安定構造の電流-電圧曲線のみを計算して比較することが一般的であった。本研究では反応力場と第一原理計算を用いて大量の電流-電圧曲線を取得し、機械学習の手法を活用して架橋構造を特定する手法を開発する。破断過程に沿って分子構造が変化するような分子に対してこの手法を適用することで、分子構造変化を引き起こすトリガーとなる構造変化を見出し、オン・オフ比と操作性の高い分子スイッチの開拓を目指す。

Outline of Final Research Achievements

Single-molecule devices attract attentions because of possible bottom-up construction, potential for device miniaturization, and utilization of unique electrical responses of organic materials. Since it is not possible to directly observe the bridging structure of the molecule between electrodes, the presence of the molecule should be confirmed through the current-voltage characteristics. We have developed a method to unveil the junction structures by combining the break junction technique, unsupervised clustering, and first-principles calculations and applied it for a tripodal anchoring molecule.

Academic Significance and Societal Importance of the Research Achievements

人間が作ることのできる最小単位の部品である分子1つを電極間に架橋した単一分子接合は、電子デバイスの小型化や有機物ならではの電気応答の利用に向けて研究が進められている。単一分子の架橋構造を直接視認することはできず、電気伝導度の計測を通じて分子架橋を確認することになるため、単一分子デバイスの電気伝導特性の計測と評価の手法を確立することは重要な課題である。我々は、ブレークジャンクション法と教師なしクラスタリング、第一原理計算を組み合わせることで、架橋構造の特徴に従って電気伝導度を分類する手法を開発し、3脚型アンカー部位を用いた分子の架橋構造解析に応用した。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (29 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (22 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 22 results,  Open Access: 8 results) Presentation (3 results) (of which Int'l Joint Research: 2 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] マックスプランクポリマー研究所(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Max Planckポリマー研究所/Padorborn University(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Phase-Dependent Electrochemical CO2 Reduction Ability of NiSn Alloys for Formate Generation2021

    • Author(s)
      Ito Yoshikazu、Kukunuri Suresh、Jeong Samuel、Elumalai Ganesan、Haji Tajuddin Aimi Asilah、Xi Zeyu、Hu Kailong、Ohto Tatsuhiko
    • Journal Title

      ACS Applied Energy Materials

      Volume: 4 Issue: 7 Pages: 7122-7128

    • DOI

      10.1021/acsaem.1c01207

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Geometric model of 3D curved graphene with chemical dopants2021

    • Author(s)
      Dechant Andreas、Ohto Tatsuhiko、Ito Yoshikazu、Makarova Marina V.、Kawabe Yusuke、Agari Tatsufumi、Kumai Hikaru、Takahashi Yasufumi、Naito Hisashi、Kotani Motoko
    • Journal Title

      Carbon

      Volume: 182 Pages: 223-232

    • DOI

      10.1016/j.carbon.2021.06.004

    • NAID

      120007180740

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Control of dominant conduction orbitals by peripheral substituents in paddle-wheel diruthenium alkynyl molecular junctions2021

    • Author(s)
      Ogawa Shiori、Chattopadhyay Swarup、Tanaka Yuya、Ohto Tatsuhiko、Tada Tomofumi、Tada Hirokazu、Fujii Shintaro、Nishino Tomoaki、Akita Munetaka
    • Journal Title

      Chemical Science

      Volume: 12 Issue: 32 Pages: 10871-10877

    • DOI

      10.1039/d1sc02407h

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Catalytic activity of graphene-covered non-noble metals governed by proton penetration in electrochemical hydrogen evolution reaction2021

    • Author(s)
      Hu Kailong、Ohto Tatsuhiko、Nagata Yuki、Wakisaka Mitsuru、Aoki Yoshitaka、Fujita Jun-ichi、Ito Yoshikazu
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 203-203

    • DOI

      10.1038/s41467-020-20503-7

    • NAID

      120006952196

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Improving Intramolecular Hopping Charge Transport via Periodical Segmentation of π-Conjugation in a Molecule2021

    • Author(s)
      Y. Ie, Y. Okamoto, T. Inoue, T. Seo, T. Ohto, R. Yamada, H. Tada, Y. Aso
    • Journal Title

      J. Am. Chem. Soc.

      Volume: 143 Issue: 2 Pages: 599-603

    • DOI

      10.1021/jacs.0c10560

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Single-Molecule Conductance of a π-Hybridized Tripodal Anchor while Maintaining Electronic Communication2021

    • Author(s)
      T. Ohto, A. Tashiro, T. Seo, N. Kawaguchi, Y. Numai, J. Tokumoto, S. Yamaguchi, R. Yamada, H. Tada, Y. Aso, Y. Ie
    • Journal Title

      Small

      Volume: 17 Issue: 3 Pages: 2006709-2006709

    • DOI

      10.1002/smll.202006709

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Acceleration of Electrochemical CO2 Reduction to Formate at the Sn/Reduced Graphene Oxide Interface2021

    • Author(s)
      Tsujiguchi Takuya、Kawabe Yusuke、Jeong Samuel、Ohto Tatsuhiko、Kukunuri Suresh、Kuramochi Hirotaka、Takahashi Yasufumi、Nishiuchi Tomohiko、Masuda Hideki、Wakisaka Mitsuru、Hu Kailong、Elumalai Ganesan、Fujita Jun-ichi、Ito Yoshikazu
    • Journal Title

      ACS Catalysis

      Volume: 11 Issue: 6 Pages: 3310-3318

    • DOI

      10.1021/acscatal.0c04887

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Decoding the molecular water structure at complex interfaces through surface-specific spectroscopy of the water bending mode2020

    • Author(s)
      Seki Takakazu、Yu Chun-Chieh、Yu Xiaoqing、Ohto Tatsuhiko、Sun Shumei、Meister Konrad、Backus Ellen H. G.、Bonn Mischa、Nagata Yuki
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 22 Issue: 19 Pages: 10934-10940

    • DOI

      10.1039/d0cp01269f

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Vibrational mode frequency correction of liquid water in density functional theory molecular dynamics simulations with van der Waals correction2020

    • Author(s)
      Zhong Kai、Yu Chun-Chieh、Dodia Mayank、Bonn Mischa、Nagata Yuki、Ohto Tatsuhiko
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 22 Issue: 22 Pages: 12785-12793

    • DOI

      10.1039/c9cp06335h

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Vibrational couplings and energy transfer pathways of water’s bending mode2020

    • Author(s)
      Yu Chun-Chieh、Chiang Kuo-Yang、Okuno Masanari、Seki Takakazu、Ohto Tatsuhiko、Yu Xiaoqing、Korepanov Vitaly、Hamaguchi Hiro-o、Bonn Mischa、Hunger Johannes、Nagata Yuki
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 5977-5977

    • DOI

      10.1038/s41467-020-19759-w

    • NAID

      120006952194

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Correlation between the Dipole Moment of Nonfullerene Acceptors and the Active Layer Morphology of Green-Solvent-Processed P3HT-Based Organic Solar Cells2020

    • Author(s)
      S. Chatterjee, T. Ohto, H. Tada, S. Jinnai, Y. Ie
    • Journal Title

      ACS Sustainable Chem. Eng.

      Volume: 8 Issue: 51 Pages: 19013-19022

    • DOI

      10.1021/acssuschemeng.0c07114

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hydrogen Bonds and Molecular Orientations of Supramolecular Structure between Barbituric Acid and Melamine Derivative at the Air/Water Interface Revealed by Heterodyne-Detected Vibrational Sum Frequency Generation Spectroscopy2020

    • Author(s)
      Masanari Okuno, Shuhei Yamada, Tatsuhiko Ohto*, Hirokazu Tada, Waka Nakanishi, Katsuhiko Ariga, Taka-aki Ishibashi*
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 11 Issue: 7 Pages: 2422-2429

    • DOI

      10.1021/acs.jpclett.0c00329

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mechanical switching of current-voltage characteristics in spiropyran single-molecule junctions2020

    • Author(s)
      Tamaki Takashi、Minode Keigo、Numai Yuichi、Ohto Tatsuhiko、Yamada Ryo、Masai Hiroshi、Tada Hirokazu、Terao Jun
    • Journal Title

      Nanoscale

      Volume: - Issue: 14 Pages: 7527-7531

    • DOI

      10.1039/d0nr00277a

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular Structure and Modeling of Water/Air and Ice/Air Interfaces Monitored by Sum-Frequency Generation2020

    • Author(s)
      Tang Fujie、Ohto Tatsuhiko、Sun Shumei、Rouxel Jeremy R.、Imoto Sho、Backus Ellen H. G.、Mukamel Shaul、Bonn Mischa、Nagata Yuki
    • Journal Title

      Chemical Reviews

      Volume: - Issue: 8 Pages: 3633-3667

    • DOI

      10.1021/acs.chemrev.9b00512

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effect of Graphene Encapsulation of NiMo Alloys on Oxygen Evolution Reaction2019

    • Author(s)
      Jeong Samuel、Hu Kailong、Ohto Tatsuhiko、Nagata Yuki、Masuda Hideki、Fujita Jun-ichi、Ito Yoshikazu
    • Journal Title

      ACS Catalysis

      Volume: 10 Issue: 1 Pages: 792-799

    • DOI

      10.1021/acscatal.9b04134

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Three site molecular orbital controlled single-molecule rectifiers based on perpendicularly linked porphyrin-imide dyads2019

    • Author(s)
      Handayani Murni、Tanaka Hirofumi、Katayose Shinichi、Ohto Tatsuhiko、Chen Zhijin、Yamada Ryo、Tada Hirokazu、Ogawa Takuji
    • Journal Title

      Nanoscale

      Volume: 11 Issue: 47 Pages: 22724-22729

    • DOI

      10.1039/c9nr07105a

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of cis-trans Conformation between Thiophene Rings on Conductance of Oligothiophenes2019

    • Author(s)
      Ohto Tatsuhiko、Inoue Takuya、Stewart Helen、Numai Yuichi、Aso Yoshio、Ie Yutaka、Yamada Ryo、Tada Hirokazu
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 10 Issue: 18 Pages: 5292-5296

    • DOI

      10.1021/acs.jpclett.9b02059

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Accessing the Accuracy of Density Functional Theory through Structure and Dynamics of the Water/Air Interface2019

    • Author(s)
      Ohto Tatsuhiko、Dodia Mayank、Xu Jianhang、Imoto Sho、Tang Fujie、Zysk Frederik、Kuehne Thomas D.、Shigeta Yasuteru、Bonn Mischa、Wu Xifan、Nagata Yuki
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 10 Issue: 17 Pages: 4914-4919

    • DOI

      10.1021/acs.jpclett.9b01983

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Impact of intermolecular vibrational coupling effects on the sum-frequency generation spectra of the water/air interface2019

    • Author(s)
      Kaliannan Naveen Kumar、Henao Aristizabal Andres、Wiebeler Hendrik、Zysk Frederik、Ohto Tatsuhiko、Nagata Yuki、Kuehne Thomas D.
    • Journal Title

      Molecular Physics

      Volume: 118 Issue: 4 Pages: 1620358-1620358

    • DOI

      10.1080/00268976.2019.1620358

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Highly Planar and Completely Insulated Oligothiophenes: Effects of π-Conjugation on Hopping Charge Transport2019

    • Author(s)
      Ie Yutaka、Okamoto Yuji、Inoue Takuya、Tone Saori、Seo Takuji、Honda Yasushi、Tanaka Shoji、Lee See Kei、Ohto Tatsuhiko、Yamada Ryo、Tada Hirokazu、Aso Yoshio
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 10 Issue: 12 Pages: 3197-3204

    • DOI

      10.1021/acs.jpclett.9b00747

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Structure and Dynamics of Water at the Water/Air Interface Using First-Principles Molecular Dynamics Simulations. II. NonLocal vs Empirical van der Waals Corrections2019

    • Author(s)
      Dodia Mayank、Ohto Tatsuhiko、Imoto Sho、Nagata Yuki
    • Journal Title

      Journal of Chemical Theory and Computation

      Volume: 15 Issue: 6 Pages: 3836-3843

    • DOI

      10.1021/acs.jctc.9b00253

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Chemical dopants on edge of holey graphene accelerate electrochemical hydrogen evolution reaction2019

    • Author(s)
      A. Kumatani, C. Miura, H. Kuramochi, T. Ohto, M. Wakisaka, Y. Nagata, H. Ida, Y. Takahashi, K. Hu, S. Jeong, J. Fujita, T. Matsue, Y. Ito,
    • Journal Title

      Adv. Sci.

      Volume: - Issue: 10 Pages: 1900119-1900119

    • DOI

      10.1002/advs.201900119

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 金-ベンゼンジチオール-金架橋構造の破断過程における幾何学的解析2021

    • Author(s)
      飛永諒介、大戸達彦、夛田博一
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Accessing the Accuracy of Density Functional Theory through Structure and Dynamics of the Water-Air Interface2019

    • Author(s)
      Tatsuhiko Ohto, Mayank Dodia, and Yuki Nagata
    • Organizer
      Molecular and materials simulation at the turn of the decade: Celebrating 50 years of CECAM
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exploring performance of DFT-MD simulation for interfacial water2019

    • Author(s)
      Tatsuhiko Ohto
    • Organizer
      11th symposium on Discovery, Fusion, Creation of New Knowledge by Multidisciplinary Computational Sciences
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] スピントロニクスのための計算機ナノマテリアルデザイン2022

    • Author(s)
      吉田博 編著
    • Total Pages
      308
    • Publisher
      内田老鶴圃
    • ISBN
      9784753622016
    • Related Report
      2021 Annual Research Report
  • [Remarks] 大戸達彦

    • URL

      http://molectronics.jp/members/51/

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi